Heraklion — Water Temperature, Sea Conditions & Trends

Water Temperature: Daily Trends, Historical Records, and Forecast

✅ As of today, the minimum water temperature ranges from 75°F (23°C) to 79°F (26°C). This is a very comfortable temperature for swimming, and many people can enjoy prolonged stays in the water without feeling cold. The water is pleasantly warm, making it ideal for relaxation and water sports. This temperature range is particularly popular among tourists, as it combines comfort and safety for health.

It is important to note that these swimming tips and recommendations apply only in good weather. When the air temperature is below 68°F (20°C), and sometimes even below 77°F (25°C), swimming can be unpleasant even with relatively high water temperatures.

Water Temperature Chart Over the Last 30 Days

Water temperature in Heraklion has risen over the last week and month. Currently, the sea water temperature at this location matches the average for this day in previous years.

According to our forecast, Water temperature in Heraklion will be 23.3°C in the next 7 days. See the table below for daily data for the upcoming week.

Table of Daily Sea Temperature Data

Annual Water Temperature Overview by Month

Monthly Water Temp Ranges

30°C

25°C

20°C

15°C

10°c

5°C

0°C

Annual Water Temperature Trend

Heraklion, the largest city on the island of Crete, sits on the island’s northern shore and benefits from a typical Mediterranean climate that keeps the sea relatively mild year-round. Sea surface temperatures around Heraklion generally range from about 16–18 °C in the coldest months (December–February), rise to roughly 17–20 °C in spring (March–May), peak in summer at approximately 24–26 °C (June–August) with the warmest waters often in July and August, and then ease back to around 21–24 °C during autumn (September–November). Local conditions such as wind, currents and shallow bays can cause short-term variations, so day-to-day temperatures may differ slightly from monthly averages.